We don't actually have to 'share'. We might choose not to be part of the 'whole world' economy. Now I am sure you Maizie, and I certainly would, think that was madness but I truly believe some think we can live just trading within our English boundaries. I say 'English' advisably as, should we decide to do this we would certainly loose Scotland and probably Northern Ireland and Wales - which, though the government treats them as fiefdoms at times are still separate countries. They would have to look at what they could do to save themselves. Indeed, instead of the United Kingdom (which should be the United Kingdoms in my view anyway) we could end up with England and the Celtic Kingdoms, the latter looking to re-join the EU. Wales might stay as they voted to leave but the conditions in the country might drive them to revise their choice.
We are already looking a difficult economic situation in the face and all the Conservatives, driven by the Neoliberals since Thatcher's day, can offer are the economics which made the Great Depression even worse in the USA and also here, after the crash of the stock market - very much along the lines of the Global Crisis in our recent past.